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Old   February 4, 2016, 09:40
Default porousSimpleFoam solutions fail
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Lisa
Join Date: Dec 2015
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Hello All,

I am working with the porousSimpleFoam solver and have a question about my Solutions.

I'm working with a porous media in the middle of a channel.

my boundary conditions are the same as in the angleDuctImplicit tutorial

0/U:
front
{
type fixedValue;
value uniform (0 0 0);
}
back
{
type fixedValue;
value uniform (0 0 0);
}

porosityWall
{
type fixedValue;
value uniform (0 0 0);
}
inlet
{
type flowRateInletVelocity;
volumetricFlowRate constant 0.1;

}
outlet
{
type inletOutlet;
value uniform (0 0 0);
inletValue uniform (0 0 0);
}

0/p:
front
{
type zeroGradient;
}
back
{
type zeroGradient;
}

porosityWall
{
type zeroGradient;
}
inlet
{
type zeroGradient;
}
outlet
{
type fixedValue;
value $internalField;
}


Here my Question: When i take a look at the velocity through my channel in paraView there is a boundary at the inlet and at the outlet of my porous media. Here the velocity has it's mximum (attached Picture). The velocity after the porous media geht's faster again. That's not realistitc, is it?

Why look my Solutions like this?

Thanks!!
Attached Images
File Type: png porosity.png (20.5 KB, 10 views)
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